Advancing Monsters, changes to damage

[Ruined]

I'm working on advancing monsters, and I was noting the changes to damage based on size. Say I have a pit fiend that's advancing high enough to get Huge size instead of Large. So, every physical attack goes up a dice increment based on the chart? So it's not only claw, but also wing buffets, bite, and tail slap?

Also, is there a general rule for advancing higher dice numbers? The pit fiend's bite (at large size) is 4d6. Should that go up to 5d6?

Thanks
- ruined

 

[Delta]

See here: http://www.d20srd.org/srd/improvingMonsters.htm#sizeIncreases
d6's become d8's.

 

[Aust Diamondew]

4d6 would probably go up to 6d6. If you look at the chart the average damage increases by 50% for each size category (approximately).
Also consider that 2d6 goes up to 3d6 therefor two sets of 2d6 would go up to two sets up 3d6 (which would equal 6d6).

When going up a size category all of the natural weapons would scale up in damage.